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Resistances for heat and mass transfer through a liquid-vapor interface in a binary mixture
1Department of Chemistry, Norwegian University of Science and Technology, NO 7491 Trondheim, Norway.
The Journal of Chemical Physics
|December 29, 2010
Summary
This study calculates interfacial resistances for heat and mass transfer in binary mixtures. Integral relations provide accurate results comparable to direct nonequilibrium solutions, with kinetic theory underestimating cross coefficients.
Area of Science:
- Thermodynamics
- Transport Phenomena
- Interfacial Science
Background:
- Understanding interfacial transport is crucial for phase change processes.
- Binary mixtures present complex heat and mass transfer dynamics.
- Accurate calculation of interfacial resistances is key for modeling.
Purpose of the Study:
- To calculate interfacial resistances for heat and mass transfer in binary mixtures.
- To validate the use of integral relations against direct nonequilibrium solutions.
- To compare calculated resistances with predictions from kinetic theory.
Main Methods:
- Direct calculation from nonequilibrium solution.
- Application of previously derived integral relations.
- Comparison with kinetic theory predictions.
Main Results:
- Integral relations yield results consistent with direct nonequilibrium solutions.
- Kinetic theory underestimates cross-coefficients for binary mixtures.
- The heat of transfer is found to be larger than predicted by kinetic theory.
Conclusions:
- Integral relations offer an efficient and accurate method for calculating interfacial resistances.
- Discrepancies with kinetic theory highlight the need for refined models.
- The findings impact the understanding of heat and mass transfer in multiphase systems.
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